2,3-Seco-2,3-diacids of the 28-hydroxy-20(29)-lupene and 28-hydroxylupane series (VIIa and VIIb, respectively) and their derivatives VIII - XIV were prepared from 28-acetoxy-20(29)-lupen-3-one (IIIa) and 28-acetoxy-3-lupanone (IIIb), respectively, by oxidation to diosphenols Va and Vb and subsequent oxidative cleavage of the C(2)-C(3) bond.
28-羟基-20(29)-熊果烯和28-羟基熊果烷系列的2,3-二酸(分别为VIIa和VIIb)及其衍生物VIII至XIV是从28-乙酰氧基-20(29)-熊果烯-3-酮(IIIa)和28-乙酰氧基-3-熊果酮(IIIb)经过氧化生成二酚Va和Vb,然后通过氧化裂解C(2)-C(3)键而制备的。